泳い

泳い

"泳い" is the stem form of the verb "泳ぐ," meaning "to swim."

泳いでいます is the -teiru form of 泳ぐ (oyogu, 'to swim'), indicating a continuous action happening in the present.

私は川で泳いでいます。

I am swimming in the river.

泳いだ is the ta-form of 泳ぐ, used to express a completed action in the past.

昨日、彼がプールで泳いだ。

Yesterday, he swam in the pool.

泳いでもいい is a conditional form of 泳ぐ followed by the phrase もいい, which means granting permission.

泳いでもいいですが、水から出たら乾かしてください。

You may swim, but please dry yourself off after coming out of the water.